Ductus - A simple tool for calligraphers

I love calligraphy, and have been learning it by myself for a while now. I used to produce some guide lines templates in AI to get writing quickly, but let's face it, this wasn't handy at all.
This tool lets you enter the number of lines you want for each part of the template, and your nib's width, and then generate a printable pdf based on what you needed.